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Posted to ojb-user@db.apache.org by Michael Becke <be...@u.washington.edu> on 2003/08/12 23:03:57 UTC

Problem storing a collection.

I am experiencing a problem when I try to store an object that contains 
a collection.  It seems that I am only able to create and add one object 
to the collection at a time.  Here are the details of my setup:

	OJB cvs snapshot from yesterday (Aug 11)
	WebSphere 4.0.5
	DB2 7.2.6
	
The repository for the classes in question look like the following, with 
unnecessary details removed.

    <class-descriptor
    	  class="Child"
    	  table="SCHEMA.CHILD">
       <field-descriptor
          name="id"
          column="ID"
          jdbc-type="INTEGER"
          primarykey="true"
          autoincrement="true"
          access="readonly"
       />
       <field-descriptor
          name="parentId"
          column="PARENT_ID"
          jdbc-type="INTEGER"
       />
    </class-descriptor>

    <class-descriptor
    	  class="Parent"
    	  table="SCHEMA.PARENT">
       <field-descriptor
          name="id"
          column="ID"
          jdbc-type="INTEGER"
          primarykey="true"
          autoincrement="true"
          access="readonly"
       />
       <collection-descriptor
          name="children"
          auto-retrieve="true"
          auto-update="false"
          auto-delete="false"
          element-class-ref="Child">
          <inverse-foreignkey field-ref="parentId"/>
       </collection-descriptor>
    </class-descriptor>

I am using DB2 identity fields for the object IDs for both of these 
classes.  Yes, I know this is not popular, but such is life.  To support 
this I am using the SequenceManagerNativeImpl (modded to remove 
setReferenceFKs() as this does not seem to work properly).

My code looks like the following:

	// the parent has already been saved and has a valid ID
         Parent parent = someparent;

         Transaction transaction = odmg.currentTransaction();
         transaction.lock(parent, Transaction.WRITE);

	Child child1 = new Child();
	child1.setParentId(parent.getId());
	parent.addChild(child1);
         transaction.lock(child1, Transaction.WRITE);

	Child child2 = new Child();
	child2.setParentId(parent.getId());
	parent.addChild(child2);
         transaction.lock(child2, Transaction.WRITE);

After this I commit the transaction but only the first child is stored.

Any thoughts?

Thanks,

Mike




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